The Blue Book Magazine [Vol. 47 No. 5, September 1928] ed. Edwin Balmer (The Consolidated Magazines Corporation, 25¢, 196pp, pulp, cover: Barren-Land Battle by Laurence Herndon) []
Details supplied by Rob Preston.
The Blue Book Magazine [Vol. 47 No. 6, October 1928] ed. Edwin Balmer (The Consolidated Magazines Corporation, 25¢, 196pp, pulp, cover: Tarzan and the Lost Empire by Frank Hoban) []
Details taken from Table of Contents.